Effective removal of chlorinated organic pollutants by bimetallic iron-nickel sulfide activation of peroxydisulfate

查看全文 作　　者：Xuan [1]Yan;Dongting [1]Yue;Chao [1]Guo;Songling [1]Wang;Xufang [1]Qian;Yixin [1]Zhao

机构地区：[1]School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200242,China

出　　处：《Chinese Chemical Letters》索引2020年第31卷第6期,共5页

基　　金：supported by the National Natural Science Foundation of China(Nos.21806106,51861145101,21777096 and 21777097);Shanghai Shuguang Grant(No.17SG11);the China Postdoctoral Science Foundation(Nos.2017M621483 and 2018T110397)。 摘　　要：Chlorinated organic pollutants(COPs)have caused serious contaminants in soil and groundwater,hence developing methods to remove these pollutants is necessary and urgent.By a simple hydrothermal method,we synthesized the bimetallic iron-nickel sulfide(FeNiS)particles which exhibited excellent catalytic property of COPs removal.FeNiS was chosen as the peroxydisulfate(PDS)activator to removal COPs including 4-chlorophenol(4-CP),1,4-dichlorophenol(1,4-DCP)and 2,4,6-trichlorophenol(2,4,6-TCP).The results show that FeNiS can efficiently activate PDS to produce sulfate radical(SO4·-)which plays major role in the oxidative dechlorination and degradation due to its strong oxidizing property and the ability of producing hydroxyl radicals(·OH)in the alkaline condition.Meanwhile,the Cl-abscised from COPs during the dechlorination can turn into the chlorine radicals and enhance the degradation and cause further mineralization of intermediate products.This bimetallic FeNiS catalyst is a promising PDS activator for removal of chlorinated organics. 关键词：Peroxydisulfate oxidation Bimetallic iron-nickel sulfide Chlorinated organic pollutants Sulfate radicals DECHLORINATION

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Effective removal of chlorinated organic pollutants by bimetallic iron-nickel sulfide activation of peroxydisulfate

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